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G. E. HANSGUM. EOT WATEE EEATEE No. 468,745. Patented Feb. 9, 1892.

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0-1:. HANSCOM.- HOT WATER HEATER.

No. 468.745. Patented Peb. 9, 1892,.

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CHARLES E. HANSCOM, OF NEV YORK, N. Y., ASSGNOR OF ONE-HALE THE HITOHINGS dr COMPANY, OF SAME PLACE.

HOT-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 468,745, dated February 9, 1892.

Application led April l0, 1891. Serial No. 388,369. (No model.)

.To all whom t may concern.-

Be itknown that I, CHARLES E. HANsooM, of the city and county of New York, in the Stateof New York, have invented a new and useful Improvement in Hot-Water Heaters, of which the following is a specification.

My invention relates to an improvement in hot-water heaters in which a circulation of water is kept up within the heater in such a manner as to expose it to a great extent of fire-surface, and thereby cause it in a highlyheated state to be circulated from the heater to any point where it may be desired to utilf ize it as a heating medium.

My present invention has for its object such a construction and arrangement of the several parts of the heater that they may be conveniently cast in sections and united in a simplev and inexpensive manner and at the same time hold the products of combustion in contact with the walls which separate the water from and rear water-legs, and a a the side walls.

The grate is represented by B, and at a point above its position the front water-leg A is provided with an opening through which the fuel is fed tothe grate, the said opening being provided with a suitable door b. A hollow breeching O is connected at its lower end with the bridge-wall c, forming a continuation of the rear leg A. An uptake D is located at the front above the leg A.

A combined water and tire-flue box is adapted to rest above the grate B, between the breeching and uptake and between the side walls, the top E of said box forming the top of the heater and the bottom E of said box forming the crown-sheet of the fire-chamber. The front and rear ends e e of the box are connected by a series of fire-tubes F, which open through the ends of the box at the front end into the uptake D and at the rear end into the combustion-chamber formed by spacing the hollow breeching O from the rear end e of the combined water and iiue box. The side walls a a are connected with the front and rear legs and with the hollow breeching by means of hollow bolts or cap-screws G. The structure of the hollow bolt-s or cap-screws is clearly shown in the detail views, Figs. 4. and 5. They are provided with a bore g, which is preferablyof polygonal form in crosssection either throughout its entire length or at-its head end for the purposev of introducing a wrench or driver for turning the bolt home. The head g ot the bolt is enlarged, forming an annular iiange intended to overlap the edge of the opening through the wall of one of the parts to be secured, while the opposite end of the said bolt is provided witha screwthread g2, adapted to register with a screwthread formed in the opening in the-wall of that part which is to be secu'red to the part through which the bolt is inserted. By reference to Fig. l it will be observed that one of these hollow bolts or cap-screws is shown in position in connection with the lower portion of the hollow breeching and the rear end of the bridge-wall c. The opening in the rear end of the bridge-wall is screw-threaded to receive the threaded end of the hollow capscrew, and the enlarged head g of the screw overlaps the edge of the opening formedin the wall of the hollow breeching C, so that when the hollow bolt or cap-screw is screwed home it will draw the wall of the breeching into close contact with the bridge-wall and at the saine time will allow a free circulation between the bridge-wall and breeching through the bore of the'bolt.

The openings in the several sections may be cored in casting and subsequently bored out and fitted with. the necessary thread and facing to receive the hollow cap-screws. They may be located at such positions as to most advantageously assist the circulation and at the same time hold the parts together with the necessary strength. Their number may be increased as experience may dictate.

IOO

Wherever they are used for the purpose of connecting the inner wall of one of the hollow sections with another section, I provide hand-holes II opposite them in the outer wall of the hollow] section to receive the hollow bolt or cap-screw and the tool for manipulating it, and when the hollow bolt or cap-screw is in position I close the opening in the outer Wall by means of a suitable cap h.

The side walls e2 e3 of the combined water and flue box are spaced from the hollow side walls of the heater, forming combustion-chambers at the sides of the box, in communication with the lire-chamber above the grate, the hot products of combustion bein g retained in such spaces between the sides of the box and the side walls of the heater by means of projections I, extending along down between the sides of the .box and the side walls near the rear end of the box. The projections I are preferably formed bya bend in the inner wall of the hollow side, as clearly shown in Fig. 3.

The hollow breeching is connected at its upper end with the interior of the water and flue boxby two or more of the hollow bolts or cap-screws, and the side walls a a are also connected with the box by such hollow bolts or cap-screws, as clearly indicated in Fig. 2.

Vater enters the heater through suitable inlet-pipes K K', in communication with the lower portions of the side walls, and escapesfrom thevheater through any one or more of the several exit-openings 7a, with which the circulation-pipes may be connected. In order to further retard the travel of the products of combustion from the lire-chamber to the uptake, I provide the inner wall of the hollow breeching C with an inwardly-extended proj ection c.

By the above construction and arrangement of parts I am enabled to form a heater in sections which may be conveniently cast and readily assembled by means of the hollow bolts or cap-screws, while at the same time the surface exposed to the heat is of great extent and the products of combustion are so retarded in their progress from the fire-chamber to the uptake as to utilize a very great percentage of their heat.

Vhat I claim is- 1. The herein-described hot-water heater, comprising the front and rear water-legs, the hollow side walls and hollow breeching, a combined water and Hue box, the bottom of which forms the crown-sheet of the 'fire-box and the top of which forms the top ol' the heater, said combined water and tine box being spaced from top to bottom along its sides and rear end from the hollow walls and breechin g, leaving a free communication with the fire-chamber at its opposite sides and rear, the water-spaces of the said water and v line boxes being in free communication with the side walls and breeching, substantially as set forth.

2. The herein-described hot-water heater,

comprising the front and rear water-legs, the

CHARLES E. IIANSCOM.

Witnesses:

FREDK. HAYNEs, C. E. SUNDGREN. 

